First, assign two variables to the prices of the two appliances.
'w' will represent the price of a washer, and 'd' will represent the price of a dryer.
Because "the washer is three times the cost of the dryer," we can form this equation:
w = 3d
On top of that, we know the washer and dryer add up to 600, making another equation.
w + d = 600
Because we know the value of 'w,' we can input that into the equation 'w + d = 600'
(3d) + d = 600
Simplify:
4d = 600
d = 150
Since the washer is three times the price of the dryer:
w = 3(150) = 450
The dryer costs $150, and the washer costs $450.
-T.B.
Answer:
250 turkey sandwiches were delivered.
There were 230 roast beef delivered.
115 PB&J were delivered.
Step-by-step explanation:
This question is solved using a system of equations.
I am going to say that:
x is the number of turkey sandwiches.
y is the number of roast beef.
z is the number of PB&J.
Donnie delivered 595 box lunches
This means that 
There were 20 more turkey sandwiches then roast beef.
This means that 
There were twice as many roast beef has PB&J.
This means that
.
So in the second equation, we have that 
Replacing this in the first equation:





115 PB&J were delivered.

250 turkey sandwiches were delivered.

So

There were 230 roast beef delivered.
First, we need to figure out the total amount that was in his account...
$120 + $80 + $75 = $275
Now, we need to subtract $30 from $275
$275 - $30 = $245
Therefore, we had $245 dollars left in his account
Hope this helps
-AaronWiseIsBae
Answer:
option b
Step-by-step explanation:


the denominator is in the surd form, so it must be rationalized